How are ceiling fans measured

A ceiling fan is an excellent solution for ventilation of cold air through the room where it is installed during the summer, as and warm air during the winter and thus helps increase the feeling of warmth in the room. Also, with constant airflow it makes, the air is much more breathable. It will serve the purpose during the whole year and also they will be quite an eye-catcher in your home. You will definitely find an adequate choice between many design solutions and a wide array of materials and shapes. If you need more pieces of information, in our other articles, you can find reviews of the best ceiling fans and guide how to maintain and use them. But before you go and buy your new ceiling fan for your living room, you need to do some preparation. Only calculations of the room measures are not enough. You need to count on many other factors. Let’s see from the beginning.

Determine the right size of ceiling fan for your room

Ceiling fans come in a wide range of blade spans, from small 18 inches span up to large fans up to 70 inches and beyond – there are even bigger fans, with extensive blade span. Choosing the right fan size will optimize its efficiency and make the fan look excellent, as part of your home interior. Determining what type of ceiling fan you should add to your room of choice can seem like a surprisingly complex decision when you are first starting out. When you are trying to determine the size of the ceiling fan for a particular room in your home, except the room measuring, you need to count in size and measures of the room furniture, as the height of the cupboard, for example. Also, you need to think about CFM and airflow, number, material and size/length of the blades, and more. Logically, you can’t put a small ceiling fan in the big room, for various reasons ( you can even burn the motor if you make that mistake) but later became a trend to install big-size ceiling fans with great blade span with over 62”, because they spread airflow more evenly through the room, even though the too big fan will not circulate air properly, same as a small fan in the big room.

First, what you need to consider while the determining size of your ceiling fan is the size and type of your room, so, let’s measure the height of your room. You need to install your ceiling fan high enough, so you avoid the risk of hitting someone. Large ceiling fans usually have a larger drop from the ceiling, so you need to consider their drop when picking what size of fan you want to install. It is some kind of standard to put ceiling fans at least 7 feet above the floor level. That means you should not install a ceiling fan in the room, which has a very low ceiling. Depending on the type of ceiling in the room, you should have to decide how high to hang the fan. If your room has a very high ceiling, you should know that ceiling fans typically comes with the optional download, the attachment that can lower your fan away from the ceiling. In that way, it will move the air through the room more efficiently. For ceilings close to 7 feet, you should search for “low mount” models. Also, count in the height of every part of the furniture, so you avoid possible obstacles. If you can’t move disputable obstacles, you should consider a smaller fan size. The blade or sweep span/shape is also an essential part of these calculations. If the ceiling fan has an odd number of blades, measure the distance from the center of the fan to the tip of any of the blades and multiply this number by 2, and you will get your fan size. If the ceiling fan has an even number of blades, measure the distance from the tip of one blade to the tip of the blade on the opposite side to find the correct blade span. The fan size of 29 inches or less would fit in every room of size less than 50 square feet, like a laundry room or hallway. 42” to 46 inches would be perfect for bedroom and/or kitchen and bigger ceiling fans from 52” to 58” and up would be an excellent choice for master bedroom, dining room or large living room.

Good to know

Additionally, the amount of air a ceiling fan can move per minute is measured in cubic feet per minute or CFM. This measurement provides a more accurate representation of the amount of space a fixture can effectively cool. This figure should be compared with the room’s overall cubic footage when deciding which fan will work the best for each room. When searching for a fan within your desired CFM range, the blade span can give you a general idea of a fans CFM range but you will always want to check the CFM of the specific fan you are interested in as motor type and blade shape can account for a more widened range. Product airflow information will provide you the best instructions for correctly calculating your room’s cubic footage.


There are many different types and designs of the ceiling fans, but only you can determine which kind, size, shape, and design will fit best in a particular room of your home. Don’t forget to maintain and clean your ceiling fan, at least between seasons, because in that way it will be fully functional always and it will last longer. You should keep in mind that fans can be used during the winter also, so it can have benefits for certain rooms and benefits for the whole household, in the form of the reduced heating bill.


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